François-Xavier Coudert
21423a1dfa
Functions from <ctype.h> should only be called on values that can be represented by unsigned char. On targets where char is a signed type, some of libgfortran calls have undefined behaviour. The solution is to cast the argument to unsigned char type. I’ve defined macros in libgfortran.h to do so, to retain legibility of the library code. PR libfortran/95177 libgfortran/ChangeLog * libgfortran.h: include ctype.h, provide safe macros. * io/format.c: use safe macros. * io/list_read.c: use safe macros. * io/read.c: use safe macros. * io/write.c: use safe macros. * runtime/environ.c: use safe macros.
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